content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------
   * SeriesDataset.java
   * ------------------
   * (C) Copyright 2000-2008, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 17-Nov-2001 : Version 1 (DG);
   * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
   * 19-May-2005 : Changed getSeriesName() --> getSeriesKey() and added indexOf()
   *               method (DG);
   *
   */
  
  package org.jfree.data.general;
  
  import org.jfree.data.category.CategoryDataset;
  import org.jfree.data.xy.IntervalXYDataset;
  import org.jfree.data.xy.IntervalXYZDataset;
  import org.jfree.data.xy.XYDataset;
  import org.jfree.data.xy.XYZDataset;
  
  /**
   * The interface for a dataset consisting of one or many series of data.
   *
   * @see CategoryDataset
   * @see IntervalXYDataset
   * @see IntervalXYZDataset
   * @see XYDataset
   * @see XYZDataset
   */
  public interface SeriesDataset extends Dataset {
  
      /**
       * Returns the number of series in the dataset.
       *
       * @return The series count.
       */
      public int getSeriesCount();
  
      /**
       * Returns the key for a series.
       *
       * @param series  the series index (in the range <code>0</code> to
       *     <code>getSeriesCount() - 1</code>).
       *
       * @return The key for the series.
       */
      public Comparable getSeriesKey(int series);
  
      /**
       * Returns the index of the series with the specified key, or -1 if there
       * is no such series in the dataset.
       *
       * @param seriesKey  the series key (<code>null</code> permitted).
       *
       * @return The index, or -1.
       */
      public int indexOf(Comparable seriesKey);
  
  }
  